Najeela and Sophina do not have summoning sickness.
You control at least three other nontoken creatures that can attack this turn.
An opponent is unable to block and kill creatures you control.
Steps
Declare Najeela, Sophina, and at least three other nontoken creatures as attackers.
Sophina and Najeela trigger.
Resolve the Sophina trigger, creating at least five 1/1 Squirrel creature tokens and five Clue tokens.
Resolve the Najeela trigger, creating at least one 1/1 Warrior creature token that is tapped and attacking.
Activate Phyrexian Altar five times by sacrificing five creature tokens, adding ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Activate Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.